Revision 14:83e3b8ba3f43, committed 2016-10-09

Comitter:

JojoS

Date:

Sun Oct 09 16:48:17 2016 +0000

Parent:

13:bc069279eb37

Child:

15:8241b7d84ad2

Commit message:

added LPC8XX Target, added define for not setting EOT flag after transmission

Changed in this revision

--- a/BurstSPI.h	Sat May 16 11:09:59 2015 +0000
+++ b/BurstSPI.h	Sun Oct 09 16:48:17 2016 +0000
@@ -3,6 +3,11 @@
 
 #include "mbed.h"
 
+// this define is for compatibility of LPC15xx or LPC8xx SPI
+// if not defined, the fastWrite() sets the EOT flag after transmission. Then the MOSI line is set high (or high Imp?) 
+// This is not the same behaviour as with older SPI hardware. 
+// For use in standard SPI this may be ok, for use as NRZ driver as in wsLib (driver for WS2812 LED) the EOT must not be set.
+#define NO_EOT_AFTER_WRITE
 
 /** An SPI Master, used for communicating with SPI slave devices at very high speeds
  *

--- a/BurstSPI_LPC_1549.cpp	Sat May 16 11:09:59 2015 +0000
+++ b/BurstSPI_LPC_1549.cpp	Sun Oct 09 16:48:17 2016 +0000
@@ -1,4 +1,4 @@
-#if defined(TARGET_LPC1549)
+#if (defined(TARGET_LPC1549))
 #include "BurstSPI.h"
 
 void BurstSPI::fastWrite(int data) {
@@ -6,7 +6,13 @@
 
     _spi.spi->TXDAT = (data & 0xffff);
     // end of transfer and receive ignore flag
+#ifndef NO_EOT_AFTER_WRITE
+    // set EOT and receive ignore flag
     _spi.spi->TXCTL |= ((1 << 20) | (1 << 22));
+#else
+    // set receive ignore flag
+    _spi.spi->TXCTL |= (1 << 22);
+#endif
 }
 
 void BurstSPI::clearRX( void ) {

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BurstSPI_LPC_8XX.cpp	Sun Oct 09 16:48:17 2016 +0000
@@ -0,0 +1,23 @@
+#if (defined(TARGET_LPC81X))
+#include "BurstSPI.h"
+
+void BurstSPI::fastWrite(int data) {
+    while (!(_spi.spi->STAT & (1 << 1)));
+
+    _spi.spi->TXDAT = (data & 0xffff);
+#ifndef NO_EOT_AFTER_WRITE
+    // set EOT and receive ignore flag
+    _spi.spi->TXDATCTL |= ((1 << 20) | (1 << 22));
+#else
+    // EOT Flag disables SPI and sets MOSI level high. 
+    // This is bad for cases where MOSI is used to generate NRZ signals like in wsLib for WS2812 LED
+    // set receive ignore flag
+    _spi.spi->TXDATCTL |= (1 << 22);
+#endif
+}
+
+void BurstSPI::clearRX( void ) {
+    //We already set receive ignore flag, so this function is never run.
+}
+
+#endif
\ No newline at end of file

--- a/BurstSPI_LPC_X.cpp	Sat May 16 11:09:59 2015 +0000
+++ b/BurstSPI_LPC_X.cpp	Sun Oct 09 16:48:17 2016 +0000
@@ -1,4 +1,4 @@
-#if defined(TARGET_LPC1768) || defined(TARGET_LPC1114) || defined(TARGET_LPC11U24) || defined(TARGET_LPC13XX)
+#if (defined(TARGET_LPC1768) || defined(TARGET_LPC1114) || defined(TARGET_LPC11U24) || defined(TARGET_LPC13XX))
 #include "BurstSPI.h"
 
 void BurstSPI::fastWrite(int data) {

--- a/BurstSPI_Unsupported.cpp	Sat May 16 11:09:59 2015 +0000
+++ b/BurstSPI_Unsupported.cpp	Sun Oct 09 16:48:17 2016 +0000
@@ -1,5 +1,5 @@
 #if !(defined(TARGET_KL25Z) || defined(TARGET_KL46Z))
-#if !(defined(TARGET_LPC1768) || defined(TARGET_LPC1114) || defined(TARGET_LPC11U24) || defined(TARGET_LPC13XX) || defined(TARGET_LPC1549))
+#if !(defined(TARGET_LPC1768) || defined(TARGET_LPC1114) || defined(TARGET_LPC11U24) || defined(TARGET_LPC13XX) || defined(TARGET_LPC1549) || defined(TARGET_LPC81X))
 #if !(defined(TARGET_NUCLEO_L152RE) || defined(TARGET_STM32F4))
 
 #warning BurstSPI target not supported, reverting to regular SPI